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F. DRESSLR. RICE DEooBTIoAToR.

Patented Mar. 13, 1894.

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NITEDl STATES PATENT Ormes..

FREDERICK DRESSER, OF CHESTER,ENGLAND.

RICE-DECORTICATOR.

SPECIFICATION forming part of Letters PatentNo, 516,479, dated March 13, 1894. Application led July 10, 1893. Serial No. 480,066. (No model.)

To aZZ whom it may concern.v

Be it known that I, FREDERICK DREssER, a subject of the Queen of Great Britain, residing at Chorlton Hall, Chester, Cheshire, England, have invented a Rice-Decorticator, of which the following is a specification.

My invention relates to improvements in machines for decorticating rice and other grain. Its object is to provide a decorticator that will rapidly and effectively decorticate grain and particularly rice, withoutinju ry to or breakage of the grain.

The common method of decorticating rice in this country is by means of an iron pestle and mortar which causes one grain to rub against another until the pellicle is removed. This method is very defective inasmuch as it requires great power to work it while it is .very tedious and slow, besides causing frequent breakage of the grain.

Some attempts have been made to decorticate rice in machines having revolving disks but so far I know none have been free from many of the defects of the older method.

By my device I overcome all these defects in making a machine that is exceedingly simple and effective in operation and capable of rapidly cleaning large quantities of grain at a much less expenditure of power than' heretofore and with consequently greater econom y.

Referring to the drawings-Figure 1 is a central longitudinal section of my improved machine, showing the back of the revolving casing in elevation. Fig. 2 is an end View. Fig. 3 is a detail of the decorticating disk or wheel. v

'Upon the central shaft S, suitablyjournaled eight or any desired number of .disks D, provided with hubs H,on each side thereof. These hubs abut against each other, and are preferably cast integral with the disks, therebyavoiding the commonv necessity of using spacing blocks of wood, dac., between the disks, and likewise dispensing with the use of addition al securing means for each disk. These hubs are preferably attached to the shaft bearings B by webs W, cast integral with the disks, the bearings being iitted tightly to the shaft; and

at one end of the series of disks a nut N securely holds the disks in place pressing the d less as described. Four of these valves are shown but any suitable number may of course be employed. At the other end is provided a hopper H into which the grain is poured, discharging it around the shaft centrally into the decorticator. The outer casing revolves by any suitable gear, preferably at a speed of three revolutions a minute, while the shaft S with the disks thereon revolves in the same direction at a peripheral speed of the disks of from sixteen hundred to eighteen hundred feet per minute. Any common form of differential gear may be used for effecting these two motions. By these two motions the grain as it is delivered through the hopper into the casing strikes against the disks by which it is thrown by centrifugal force against the outer revolving casing which, moving in the same direction, carries it through the machine and discharges it through the valves at the opposite end. In causing the casing to revolve in the same direction with the shaft and disks thebreakage of the grain is avoided. v

I employ the novel abrading disk shown in detail Fig. 3, where it will be seen I provide a I perforated disk having notchesX in the periphery, with an annular ilange Z midway between the hub and the circumference, and

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side of said flange the latter will prevent this body on each side of said ange, and an ernery crack from extending farther inward. composition enveloping the said disk and eX- What I claim istending to the hub, substantially as described. In a grain decorticating machine having an In testimony whereof I have signed my 5 axial feed, the combination with an outer rename to this specification in the presence of i 5 volving casing, of a revolving shaft provided two subscribing witnesses.

with a series of abrading disks, ,each c0nsist- FREDERICK DRESSER. ing of a cast iron body with a notched periph- Witnesses: ery, and having an annular lange between its ALBERT POPKINS,

xo periphery and hub, with perforations in said J. FRED. KELLEY. 

